Valve-grinder.



F. 0. ALBERTSON.

'VALVE GRINDER.

APPLICATION man sEPT.2o.19|7.

Patented Oct. 22, 19181,

LQl.

UNITED sTATEs PATENT oEEIoE.

FRANS o. ALBEBTSON, or sIoUx cITY, IOWA, AssIGNon To nLBETsoN a comNY,

' OF SIOUX CITY, IOWA, n CORPORATION or IOWA.

VALVE-GENDER.

Specication of Letters Patent.

Patented oet. 22, 191s.

Application led September 20, 1917. Serial No. 192,237.

-a subject of the King of Sweden, residing at Sioux Ci in the county of Woodbury and State of owa, have invented a certain new and useful Improvement in Valve-Grinders, of which the following is a full, clear concise, and exact description, reference had to the accompanying drawings, forming a part of this specication.

This invention relates to devices for` grmding or refacing valves, and particularly valves of the puppet type commonly employed in connection with internal combustion engines. Broadly the object of the present invention resides in the provision of a Avalve grinder whose characteristics include simplicity, eiciency and cheapness.

Although some of the features of the present invention may be utilized in connection with other types of valve grinders, I have Ashown them in the accompanying drawing applied to the preferred form of grinder, which is of the type including a progres: sively advancing oscillatory driven4 member. In the oscillatory progressively advancing valve grinder, it has been the practice to employ a plurality of bevel gears, usually three bevel gears, two -of which are muti'- lated and arranged to cooperate with the third to Oscillate the latter and advance it progressively. To reduce the cost of manufacture I have devised an arrangement whereby it is possible toobtain the same mechanical result with spur gears and in the preferred form of the invention these spur gears are stamped from sheet material.

A further object of the present invention resides in 'the provision of self-adjusting bearing mechanism for the driven or oscillatory part of the grinder. Another object is the provision of a simple, c heap and effective arrangement for maintalnlng the power applying shaft or dr1ving shaft of the grinder in proper pos1t1on with respect to the driven or oscillatory shaft thereof.

These and other objects of the present invention will be pointed out more clearly in being connection with the accompanying drawings, wherein- Figure 1 is a vertical cross sectional view of one form of valve grinder embodying the novel features of my invention, some of the parts being shown in elevation;

Fig. 2 is a front view of the valve grinder shown in Fig. 1; with the crank and cover plate removed; and t Fig. 3 is a fragmentary plan view of the improved gearing arrangement interposed between the driving and driven shafts.

Similar characters of'reference refer to similar parts throughout the several views. As illustrated in Figs. 1 and 2, the valve grinder comprises a cylindrical casing 4 pro- Y vided with a cover plate 5 adapted for screw threaded engagement withl the casing, `as shown at 6. Screw-threading into the casing 4 at the upper end thereof is a screw 7, which serves to hold the handle 8 in place. .'Ihis handle 8 may be constructed of any suitable material, and in the preferred form of my invention is made of wood. Extending through the cover plate 5 and bearing in the cover plate and in the casing 4 is an operating or -driving shaft 9. The outer end of the shaft 9 is attached to an operating crank 10. Any convenient arrangement may be utilized for connecting the shaft 9 and crank 10. In the preferred form of my invention the crank 10 is screw-threaded Onto the shaft 9. Rigidly fixed to the shaft 9 is a sleeve or collar 11 to which is fixed a pair of mutilated gears 12 and 13." As most clearly shown in Fig. 2, the gears 12 and 13 are mutilated so that one of the gears contains more teeth than the other. Fig. 2 shows the Vgear 13 as being provided with 4nine teeth and the gear 12 with six teeth.

7. A valve grinder comprising a drivin In Witness whereof, I hereunto subscribe shaft, a pair of mutilated spur gears on sai my name this 14th day of September, A. D. 'L0 haft, a lllirfiven simft, a sgilur gar onlsaiud 1917.

riven s a t, mes ing wit sai muti ate 5 gears, and means on the gears on saiddrv- FRANS 0' ALBERTSON' ing shaft for insuring meshing with the Witnesses: gear of said driven shaft co-aetng with the C. N. JEPsoN, teeth of the driven gear EDWD. PEARSON. 

